I'm not sure I follow the opinions of the people suggesting this person.. "drop their clients" and start their own site. Since when was seo and sales conversions the same thing? They're not really the same thing.
I guess I'm asking what would be some good options? I'm considering starting up SEO again part time to make some extra money on the side, but I'd rather do my own thing than search for clients, or do both to be a bit more independent. Thanks!